“农田冻土深度观测”的概念、定义、翻译、参考文献-科学参考

单词	农田冻土深度观测
释义	农田冻土深度观测 Encyclopedia 农学农田冻土深度观测释 field observation of frozen soil depth农田冻土深度观测对农田土壤冻结时间、冻结层次及其上、下限深度与冻结程度的观察与测量活动。
随便看	quadratic polynomial quadratic programming quadratic programming problem quadratic rate of convergence quadratic rate of increase quadratic reciprocity quadratic reciprocity law quadratic reciprocity theorem quadratic recurrence equation quadratic representation quadratic residue quadratic residue modulo m quadratic residue symbol quadratic residue theorem quadratic risk quadratic root quadratics quadratic sieve quadratic sine quadratic smoothing quadratic solitons quadratic space quadratic space of a quiver quadratic square quadratic stability

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